For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
Unambiguous Tracking Method Based on a New Combination Function for BOC Signals
Lan YANG Zulin WANG Qin HUANG Lei ZHAO
IEICE TRANSACTIONS on Communications
Publication Date: 2014/04/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
Category: Navigation, Guidance and Control Systems
BOC modulation, global navigation satellite system, unambiguous tracking, tacking error standard deviation,
Full Text: PDF>>
The auto-correlation function (ACF) of Binary Offset Carrier (BOC) modulated signals has multiple peaks which raise the problem of ambiguity in acquisition and tracking. In this paper, the ACF is split into several sub-correlation functions (SCFs) through dividing the integration period of ACF into several partials. Then a pseudo correlation function (PCF) is constructed from the SCFs through a combination function to eliminate all side-peaks. The unambiguous tracking method based on the PCF achieves better code phase tracking accuracy than the conventional methods in AWGN environment. It only requires half computation cost of Bump-Jumping (BJ) and nearly quarter of Double-Estimator, although offers slightly less accurate tracking than BJ and Double-Estimator in multi-path environment. Moreover, this method suits all kinds of BOC signals without any auxiliary correlators.